_Nothing 3040 modules/highgui/src/ppltasks_winrt.h enum { _Nothing, _Schedule, _Cancel, _CancelWithException } _Do = _Nothing; _Nothing 3359 modules/highgui/src/ppltasks_winrt.h enum { _Nothing, _RunContinuations, _Cancel } _Do = _Nothing; _Nothing 3040 modules/videoio/src/ppltasks_winrt.hpp enum { _Nothing, _Schedule, _Cancel, _CancelWithException } _Do = _Nothing; _Nothing 3359 modules/videoio/src/ppltasks_winrt.hpp enum { _Nothing, _RunContinuations, _Cancel } _Do = _Nothing;